HP OpenVMS Systems

MOUNT, Labels, Logicals, and Device Naming?

Am I doing something wrong or using the wrong commands? I can get the last 2
drives to mount but not the other 4. I'm stumped.

The Answer is :

Some of your disk devices apparently have a volume label that mimics
the semantics of an OpenVMS physical disk device name, and some do not.
Use the following command to MOUNT an arbitary disk device "ddcu:" and
determine its volume label:
MOUNT/OVERRIDE=ID ddcu:
Once you know the volume label, add the command to the system startup
SYSTARTUP_VMS.COM or -- if this is a cluster -- consider creating and
using a locally-customized version of SYS$EXAMPLE:MSCPMOUNT.COM.
If you wish, you can use the following command to change the volume
label:
$ SET VOLUME/LABEL=label ddcu:
The typical MOUNT command is as follows:
$ MOUNT ddcu: volume-label [logical-name]
You could then use th logical name explicitly specified on the MOUNT
command (if any) or the MOUNT-created DISK$volume-label logical name
(see below) to create any additional logical names that are required.
For instance:
$ DEFINE/SYSTEM/EXECUTIVE new-logical-name DISK$volume-label
When you mount a disk device on any recent OpenVMS version, the OpenVMS
MOUNT command will transparently create both the logical name specified
by the logical name parameter on the MOUNT command (if specified) and a
volume logical name that is created by appending the volume label onto
the string DISK$. (In the case of your volume with the volume label
DKB0, the logical name generated by MOUNT would be DISK$DKB0.) For
more and more specific information on MOUNT, please see HELP MOUNT or
the MOUNT documentation in the OpenVMS documentation set.
The OpenVMS Wizard would encourage using volume labels which related
to the contents of the disk and that do not -- and this approach is
solely to help reduce the confusion, there is no technical prohibition
against this usage -- mimic the OpenVMS physical device naming.
The OpenVMS Wizard prefers to use the DEFINE command, as the parameters
on this command -- unlike the ASSIGN command -- follow the "from to"
order found on most other OpenVMS commands. (ASSIGN follows the older
RSX-derived parameter ordering; the "to from" parameter ordering.) This
consistency can help reduce some of the confusion with parameter ordering,
particularly when using parameters -- such as using device labels that
closely parallel device names -- that are already somewhat confusing.
Both the DEFINE and the ASSIGN commands are fully supported.
When referencing devices, the OpenVMS Wizard would encourage using
the DISK$label logical names and not the physical device names.
This makes the effort involved in reorgnizing or in upgrading the disk
storage far simpler.